Variable-speed-transmission gearing.



G. ZINK.

VARIABLE SPEED TRANSMISSION GEARING.

APPLICATION FILED FEB. 28. 1914.

Patented Dec. 15, 1914.

2 SHEETSSHEI I T 1.

THE NORRIS PETERS 60.. PnUTOLITHDA. WASHING rON. D C.

G. ZINK.

VARIABLE SPEED TRANSMISSION GBARING.

APPLICATION FILED FEB.2 8 1914.

1,121,442, Patented Dec. 15, 1914.

g 2 8HEETS-SHEETL GEORGE ZINK, or WAYNESBORO, PENNSYLVANIA. 1

-.VARIABLE-SPEED-TRANSMISSION GEARING.

Application filed February 28, 1 14. "Serial No. 821,672.

To all 'w/wmt't may cone-em Be it known that zen of the United States, ,residing at Waynesboro, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Variable- Speed-Transmission Gearing, whichthe following is a specification. p

This invention relates to an improvement in variable speed transmission gearing, and

the object isto provide means whereby the speed of the driven member can be ncreased at the will of the operator, and 1t is only necessary to bring thedriving member to a neutral position, so that the driven member can be broughttoa stop before reversing I the driven member.

This inventlon relates more particularly to that class of invention wherein a disk is provided with aplurality of pins which are engaged by a worm for transmitting rotary movement to the disk, and oneof the objects of this invention is to provide a disk or member with a plurality of concentric rows of pins Which'are adapted to mesh with the worm mounted-upon a rotating shaft. The

shaft is also capable of an oscillatory movement, so that the worm can pass from one row of pins to another, and it is necessary that the worm travel in the arc of a circle in its movement from one row of pins to another, so that there will be a meshing between the worm and the rows of pins.

The invention relates to still other novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claims.

In the accompanying drawings: Figure l is a top plan view of the invention; Fig. 2 is a view in side elevation; Fig. 3 is a top plan view of a slightly modified'form; Fig. 4.- is a view showing the disk or driven member in a reverse position and an edge elevation of another modified form; and Figs. 5 and 6 are detail sectional views showing the manner of mounting the pins or teeth upon the driven member.

A represents the driven member, which is in the form of a disk, and which is disclosed in Figs. 1 and 2 splined to a shaft 2 by a key 1.

Mounted upon the driven member or disk A are a plurality of concentric rows of pins I, GEORGE: ZINK, a citi.

tened 'to thedisk by means of the shanks or teeth 3. The pins are preferably fast:

Specification ofLettersPatent. .P t f djj ;15,1 914 4, lfof'the teeth passing through orifices in the disk andnuts 5 screwed upon the ends of the shanks for fastening the shanks and pins securely to the disk, this being clearly set forth in Flg. 5 of the drawing, and inFig.

6 the pins are shown as being madeintegral wlththedisk. A power-drivenshaft 6 has a beveled gear' 7 mounted thereon, with which a beveled gear 8 meshes.

A shaft 9 is mounted upon the shaft 6 by means ofa hanger 10, which permits of the shaft being oscillated at the will of the operator. The shaft 9 has the beveled gear 8 journaledon one end thereof, so that as the I shaft 16 isrotated, rotary motionis trans-v mitted to shaft 9 through beveled gears [T Mounted upon the shaft 9is awormgear 11. This gear'has what is known as the V- shaped thread, so that it is capable of mesh ing j'with the pointe d eoneshaped teeth or pins 3"onthe disk ordr'ive'n member A. The

outermost. row ofpins represents the lowspeeddriving; the second row, the second speed; and the third or innermost row, high speed.

When the shaft 9 is oscillated on one side A be caused to travel in a reverse direction, The worm can be brought to a neutral position at any time, either at the center'of the disk, or between the various rows, and it is not necessary to stop the driven member or disk for the purpose of changing the speed, but of course when it is desired to reverse the direction of travel of the disk, it is necessary to bring the driven member to a stop before throwing the worm into gear with the teeth or pins on the opposite side of the disk.

The fact that the pins are made tapered and cone-shaped so that they terminate in a point and the Worm on the shaft 9 is made with a V-shaped thread permits of the worm being shifted transversely of the disk in the arc of a circle for changing the speed of rotationofthe disk without the necessity of raising the worm gear from one row of pins and inserting it into mesh with another row. 7

The travel of the worm gear in the arc of a circle permits it to be moved from engagement with one row of pins into engagement with another row of pins by simply moving the gear transversely and in the arc of a circle across the face vof the driven member;- The worm shaft may be rotated or it may be stationary during the oscillatory movement, and in either instance, the

andnear the peripheral edge of the disk which meshes with the. beveled gear 16 on a shaft 17. e p a From the foregoing it will be seen that I have provided a variable speed transmis- S1011 gearing which is applicable for many uses, such as automobiles, lathes, traction Copies or this patent may be obtained for ,five cents each,; by addressing the Commissioner of Pat ents, 1

engines, or any machine or apparatus wherein a variable speed is desired.

I claim: i

l. The combination with a driven mem ber, of a plurality of concentric rows of pointed teeth mounted on the driven mem- "with the variousrows of'teeth, for changing the speed of the driven member.

2. The combination with a driven niem- 7 ber, of a plurality of concentric rows of pointed cone-shaped teeth, a rotatable and oscillating shaft, and a worm gear mounted on the said shaft having V-shapedy threads adapted to mesh with theteeth on the driven member, said gear adapted to be moved transversely of the driven 'mem her and in'the arc of a circle for causing the worm to be brought into mesh with the'various rows of teeth for changing the speed of the driven member aiid for reversing the direction of travel of said member.

In testimony whereof I affii: my 'sig'nature, in the presence of two witnessesu I GEORGEZINK; I i! Witnesses, J. K. MOORE,

WATTS T. ,ESTABROOK.

1 v Washingtomnfi. 

